Development of Micro-shear Fatigue Test and its Application to Single Crystal of Pure Iron

M. Hayakawa, E. Nakayama, K. Okamura, M. Yamamoto, Kazuyuki Shizawa

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

In this study, a new fatigue testing method under shear and axial loading was developed for small specimens (3mm long and 0.3mm thick). The method was applied to a single crystal of pure iron and extra-low carbon steel in order to investigate the effect of shear and normal stress on cyclic slip activity. The specimen was sufficiently small to be prepared from a single crystal, aiming at a specific slip system in the shear loading direction. Moreover, the specimen had a single edge notch, which was designed to generate both pure shear stress and normal stress. Using this testing method, shear fatigue strength with a static normal stress on the slip system [111] was evaluated, and the fatigue strength was compared with that of polycrystalline ferrite steel with static axial loading.

Original languageEnglish
Pages (from-to)167-174
Number of pages8
JournalProcedia Engineering
Volume160
DOIs
Publication statusPublished - 2016

Keywords

  • Multiaxial fatigue
  • Shear fatigue strength
  • Single-crystal iron
  • Slip plane
  • Small specimen

ASJC Scopus subject areas

  • Engineering(all)

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